Optimization of polyphase codes based on weighted cyclic algorithm for synthetic aperture radar

Synthetic Aperture Radar (SAR) can bring high range and azimuth resolutions, and is valuable to military and civil usage. Corresponding to the problem that SAR can be easily affected by deceptive jamming, one method based on multiple orthogonal phase codes jittered between neighboring pulses is proposed to anti jamming. Based on Weighted Cyclic Algorithm, long polyphase codes are optimized and then peak of the codes´ correlation function is increased. The sidelobes of correlation function as well as the peak of cross-correlation function are decreased with the method. Simulation testified the performance of the method through comparison with the performance of biphase code.